Heating and mixing plant.



I'. 0. BLAKE.

` HEATING AND MIXING PLANT.

APPLICATION FILED JULY 29, 1907.

0 0 O O Q O l O Patented June 8, 1909.

3SHEETS-SHBET 1.

F. 0. BLAKE.

HEATING AND MIXING PLANT.

APPLICATION FILED JULY 29, 1907.

924,182. L Patented June s, 1909.

3 SHEETS-SHEET Z.

F. 0. BLAKE.

HEATINGr AND MINING PLANT. APPLICATION FILED JULY 29, 1907. 924, 1 32, Patented June 8, 1909.

3 SHEETS-SHEET 3.

W/TIVESSES: /V VIENTO/.

y l l bly HA- l f ATTORNEY.

UNITED sTATEs PATENT oEEioEl FRANK O. BLAKE, OF PITTSBURG, PENNSYLVANIA,ASSIGNOR OF ONE-HALF TO GEORGE LUTZ, OF KANSAS CITY, MISSOURI.

HEATING .AND MIXING PLANTA To all 'whom' it may concern:

Be it known that I, FRANK O. BLAKE, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State.` of Pennsylvania, have invented certain new and useful Improvements in Heating and Mixing Plants; and-I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had' to the accompanying drawin s, Vand to the figures of reference ,marked t` ereon, which form a part lof this specification.

My invention relates to a heating and mixing lant, and more particularly to a plant for eating and mixing asphalt, andhas for its principaljobject to provide a plant of that class, -com rising in part a single mixing drum, in w ich the ravwmaterials from which the paving-composition is formed may be heated, 1 melted and amalgamated, thereby simplifying fthe ordinary process which usually consists of heating sand in one vessel, melting the asphalt or other material a second vessel, and delivering these component artsto` a third vessel Where they are mixed), and "from fwhich the mixture is drained off for delivery to its final destination. In-accomplishing this object,` I provide a drum which may be for a greater part of a construction similar to those in'ordinar use, but WhichgI prefer to construct accor ing to the improved design shown in the drawings and hereafter described. In combination with this drum I provide suitable means for creating'a iiuid heating medium, and for conducting this medium to the interior of thedrum, for the purposes heretofore set-forth'.

. In the usual process of heating and melting the asphaltic composition, which consists of applying flame to the bottom of the vessel containing the composition, -the vessel is often overheated and the vitality of the composition destroyed. To (obviate this disadvantage I prefer the form of heating apparatus shown in the drawings,vwhich consists of a conduit leading from the boiler stack' to an opening in the mixing drum, or from a separate furnace-to said rum which conduit is of such length that a thorou h combustion lof the fuel takes place before t e air from the 'I supply source reaches the drum, so that the heated fair, free from flame,ycomes in direct contact with the material within the drum. i

Specification of Letters Patent. I Application iiled July 29, 1907. Serial No. 385,980.

:Patented .Tune s, isos.

to the drum.

A further object of my invention is to provide an asphalt mixing 1plant, which may be moved Ifrom place Vto p ace in order that the materials may be mixed and the composition delivered to a point adjacent to that Where the work is belng done. In accomplishing this object it is necessary to `provlde imroved details of structure, my preferred orm of which is illustrated in the accompanying drawings, in which- Figure I is aK -view in side elevation of an vasphalt mixing plant constructed according to my invention. Fig. II is a central longitudinal view of same. F' III is a top plan view of the carrying andleatin parts; the mixing drum being removed to Iietter illustrate these parts.

Referring more in detail to the parts:- 1 indicates a truck frame which is mounted on a runnin gear, comprising the rear and front axle'2, aving ordinary traction Wheels. On the rear axle 2 is rigidly mounted a driving sprocket 3, which meshes with the pinion 4 on an auxiliary shaft 5. Also rigidly mounted on shaft 5 is the beveled gear wheel 6, which meshes with the pinion 7 on the end of the shaft 8, which is journaled in brackets 9, de ending from the truck frame 1. Also ri idlp apted to mesh with an idler 11, slidably mounted on a shaft 12, which is journaled in brackets 13 on the truck frame 1.y

14 indicates. an engine shaft upon which is r' idly mounted -a spur drive Wheel 15, W ich latter vis adapted to mesh with wheel 1 1, and with a spur wheel lrigidly mounted on a4 drum drive shaft 17, said shaft 17 being j ournaled in suitable bearings on aplatform 18, which latter is supported on the rear end of the truck frame 1.

Supported near the front of the truckis a boiler.19,. in which steamis generated foi` operatin the engine 20.

Near t e edge of platform 18 on the rear of the truck, and opposite shaft i7, is revolubly mounted a second shaft 21, andcarried by y mounted on shaft 8 is a spur Wheel 10 l shafts 17 and 21 are the Wheels 22,'upon.` v

. when the wheel 16 is inmesh with they drive" drum drive shaft 17 are mounted the spurl wheels 26, which are adapted toengage teeth 25, for the purpose ofrevolving said drum wleel15..

rCovering the ends of drum 23 are the caps 27 and 28, each having a central cut outJ portion, and opening into cap '27,is a heating pipe 30 around which cap 27 revolves.

ipe 30 leads to and opens into'the stack 3 1 of the boiler 19, and projecting through pipe .30 and into the interior. of the drum is a lhopper 29Vthrough which the material is fed.

33 indicates a dump board, which is-supported on 'the edge of the opening in cap 27,. and by a swinging arm 34, which is pivoted to a bracket 35, carried by platform 18. On the bottom of board 33 is an eye-bolt 36, and

carried on bracket 35 is a hook 37, adapted dotted lines in Fig. II.

39 indicates a steam exhaust pipe opening from engine 20, and carrying on its u per end a union 40.within one end of which 11s) se'- cured a branch pipe 41, leading to and opening into the stack 31 ofboiler 19, and carried on I exhaust through the end of branch 41, within. saidstack is a jet 42, through which steam is discharged,- for the purpose of creating a forced draft in the boiler. l

41 indicates a valve for controlling the stack31. l

47 indicates mixin blades onthe inner surface-of drum 23, t e .ends of which adjacent to the cap 28, are cuprled as shown, for the purpose of elevating ,t e material so that it ma be dro ped onto the dump board 38, for de ivery w enthe .latter is in its receivingpositionfA s Opemn -fromunion `is a pi e. 48, which projects t rough the heat con uctin downward blast may be created in pipe 30,'

and through the mixin ,drumf y50 indicates an a, 'iary furnace carried I onframe J1', and having a heat conducting pipe 51 opening into pipe 30; said furnace4 the" 'heating function. Y

When in use, thefparts are arranged as' described, and theplant conducted by its own ower to the place where the paving is to-be aid. When 1n the proper position, the driv? ing artsare thrownout o contact with the truc propelling gearing and into contact With the drum revolving parta-'Tand the drum pipe 41, and 31 a hood on -means for securing testing samples are proipe` 30, and carries a'jet.49 vthrough w ic a` revolved upon the supporting wheels' 22. The material is fed into the drum through the hopper 29, and the exhaust steam turned int'o pipe 30, forfthe u ose of creating a forced draft from the4 oi er flue or furnace pipe through the pipe 30 and drum 23, the

ood on stack 19- being closedto aid in diverting the heated air from the 'boiler through the drumror if desired, means may be provided for furnishing live steam. instead of exlfaust, to the blowers. When the materials have been properly mixed by reason of their agitation the revolving drum, and raised 'to the desired temperature, by the heat passing from the boiler or furnace through the drum, the dump board which during the mixing process has remained in the non-receiving posltion indicated in dotted lines in Fig. II, is inserted through the opening in cap 28, into the interior of the drum and its outer end secured in osition by means of hook 37, as shown' in' fu lines in Fig. II. When the dum board is inthis position, the material which is carried up within the-Ydrumby means ofthe blades-47, Will drop into the inner endl of the dump board, and slide down the inclined surface to be delivered to a y pro er receptacle or onto the avement.

- y passing the heated air t rough a con-` ducting pipe beforedelivering it to the drum,

the danger of burning the materials by bringing flame into contacttherewith is obviated, although, the necessary heat for securing a roper mixture is secured; and by having the ldelivery end provided with the port shown, a convenientexit for the heated air, a delivery port for the asphaltic mixture, and a vided. 4

I have shown engine and boiler arts, and carrying gear in combination wit m improvement, which are commonly use and Well known, and for that reason are not described in detail, nor claimed.

IHaving thus, described m invention, what I claim as new therein, an desire t 0 secure by Letters-Patent is- 1. A machine for preparingby a plicatio'n of heat and simultaneously mixing he assembled in redients of asphalti, btuminosand other ligke mixtures, comprising a receptacle into which the proper pro ,ortions of the materials may be introduce constructed to confine 'said materials until the are voluntarily withdrawn therefrom, an containing means-"for continually cascading the assem- Abled,materials-for any desiredtime; said receptacle being constructed to permit the passage of a fluid heating medium throu h it in a path intersecting the path through w ich the material is cascaded means causin the flow of a hot iluid through said receptac e in said path; and means for withdrawing the batch of mixture at will, said withdrawing means being adjustable relatively to the receptacle.

iao

2. A machine for reparing byA application of heat, and `for miJxinv'the assembled ingredients of asphaltic, bltuminous and other 1ke, mixtures, comprising a rotary drum' with heads having axial'openings'for the pasfluid through the axial'openings; said drum being provided with s irring `and lifting means on its linner periphery. adapted to cascade the materials continually A.or any desired time, through-the current' 'of fluid'heat' ing medium passmg through the drum; and means for withdrawing the batch of'mixture at will, whereby the mixture may be treated till it reaches the desired condition and then'. withdrawn, said means for withdrawing the batch, being adjustable relatively to the receptacle. v H v '3; The combination withva portable carrying frame having suitable running gear and a motor carried by and adalted for 4propelling said frame, .of a revolub e heating drum, means for supplyin a fluid heatingmedium, al conduit for conuctingthe fluld heating medium to 'said drum, and a jet blast discharging into saidlconduit in a direction to causea flow of the fluid heating medium toward said drum,A and a delivery of said heating medium to the interior 'of said drum.

4. The combination of a revoluble heating' drum ada ted forA receiving and delivering material uring its revolution, means `for supplying a fluid heating medium, a conduit for conducting the .fluid heating medium from the source of-su lyto theinterior ofv said drum, and a jet lbliast ldischar ing into said conduity intermediate the sup source and drum and adapted to cause a ow of the heatingmedium toward said drum.

means and said drum', anda jet blast 'char ing into said conduit intermediate said 5. The combination of a revoluble heating drum having central end openings, means for su plying a fluid heating medium, a conduit t rough which the heating medium is 'delivered from its source through one of the drum openings, and a jet blast discharging into said conduit intermediate the sup ly source and drum and adapted to cause a ow of the heatn medium from A the supply source into'sai. drum. I y 6. In an asphalt mixing lant, the combination with a revoluble rum vhaving end openings, of meansv for supplying a fluid heating medium, aconduit leading from the heating medium supply means to one of the drum openings, means in'said conduit intermediate the heating medium sup ly and drum whereby a blast is delivere in the lirec'tion of saiddrum, means for delivering material to said drum, and adjustable means for withdrawing the material from the drum durin its rotation.' i 7. n an asphalt mixing plant, the combi nation with a truck frame and ruiming' gear, of va drum revolubly mounted on said frame and adapted ior -receiving and discharging material during its revolution, a motor carried by and adapted for propelling said irame and for actuating said drum, an independent fluid'heatingmedium supply means carried onframe, a conduit connecting said supply up y means and drum, for the purpose set ort FRANK O. BLAKE.

Witnesses z.

JOHN F. WADE, STANLEY SAVAGE. 

